Build & Monetize a Manifest V3 Chrome/Edge/Firefox Extension with Zero Backend
Includes Shadow-DOM content script injection, side-panel UI, background service worker messaging, and serverless license key verification.
Interactive Build-vs-Buy Engineering Calculator
Save ~84 Engineering Hours vs. Building From Scratch
$129 Lifetime
Instant Digital License • Merchant of Record
{
"manifest_version": 3,
"name": "Pro Utility Extension",
"version": "1.0.0",
"permissions": [
"storage",
"sidePanel",
"activeTab"
],
"side_panel": {
"default_path": "sidepanel.html"
},
"background": {
"service_worker": "background.js",
"type": "module"
}
}
What’s Included in ExtPay Chrome Extension Kit
- Hot-module reload (HMR) for Content Scripts & Side Panel (20 hrs saved)
- Isolated Shadow-DOM UI that never clashes with host page CSS (18 hrs saved)
- Stripe & Lemon Squeezy license activation without a custom backend (26 hrs saved)
- Automated Chrome Web Store & Firefox Add-on ZIP bundler (20 hrs saved)